/usr/share/doc/libgrafx11-1-dev/changelog.Debian.gz is in libgrafx11-1-dev 20061220+dfsg3-4.2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libgrafx11-1-dev/../libgrafx11-1-gfortran/changelog.Debian.gz